android - How to dynamically add polylines from an arraylist

Question

I have an

places = ArrayList<ArrayList<LatLng>>

I am adding LatLng points into the inner ArrayList and then I have a for loop that loops and adds polylines to the map.. except it doesnt do that... How can I add polylines dynamically to the GoogleMap? I checked whether or not places was being populated and it is.

Thanks in advance.

ArrayList<Polyline> pl = new ArrayList<Polyline>();                 
for(int i =0; i<places.size(); i++){
        pl.add(mMap.addPolyline(new PolylineOptions().addAll(places.get(i))));
        Log.e("size of places", "size of places is " + places.size());
    }

Answer 1

Adding multiple points in map using polyline and arraylist

ArrayList<LatLng> coordList = new ArrayList<LatLng>();

// Adding points to ArrayList
coordList.add(new LatLng(0, 0);
coordList.add(new LatLng(1, 1);
coordList.add(new LatLng(2, 2);
// etc...

// Find map fragment. This line work only with support library
GoogleMap gMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();

PolylineOptions polylineOptions = new PolylineOptions();

// Create polyline options with existing LatLng ArrayList
polylineOptions.addAll(coordList);
polylineOptions
 .width(5)
 .color(Color.RED);

// Adding multiple points in map using polyline and arraylist
gMap.addPolyline(polylineOptions);